Coal blending and burning system based on belt conveyors with vertical process modules

Abstract

A coal blending and burning system based on a belt conveyor with a vertical process module includes a coal feeding system No. 1 provided with discharge ports 1A and 1B for outputting a coal type A; a coal feeding system No. 2 provided with discharge ports 2A and 2B for outputting a coal type B; a first belt conveyor A provided with electronic scales 1A and 2A, respectively; a first belt conveyor B provided with electronic scales 1B and 2B, respectively; a vertical drop tube; a second belt conveyor for transporting coal materials output from the vertical drop tube; a third belt conveyor for transporting coal materials output from the second belt conveyor to a coal supply end; and a controller for controlling coal blending on the first belt conveyor A, the first belt conveyor B, or the second belt conveyor.

What is claimed is: 
     
         1 . A coal blending and burning system based on a belt conveyor with a vertical process module, comprising:
 a coal feeding system No.  1 , provided with discharge ports  1 A and  1 B, for outputting a coal type A;   a coal feeding system No.  2 , provided with discharge ports  2 A and  2 B, for outputting a coal type B;   a first belt conveyor A, positioned directly facing the discharge ports  2 A and  1 A in sequence, and provided with an electronic scale  1 A located at a rear side of the discharge port  1 A and an electronic scale  2 A located at a rear side of the discharge port  2 A, respectively;   a first belt conveyor B, positioned directly facing the discharge ports  2 B and  1 B in sequence, and provided with an electronic scale  1 B located at a rear side of the discharge port  1 B and an electronic scale  2 B located at a rear side of the discharge port  2 B, respectively;   a vertical drop tube, provided with an input port located at a top portion and an output port located at a bottom portion; the input port is connected to the first belt conveyors A and B, and the output port is connected to the second belt conveyor;   a second belt conveyor, configured to transport a coal material discharged from the vertical drop tube;   a third belt conveyor, configured to transport a coal material discharged from the second belt conveyor to a coal supply end; and   a controller, connected to the coal feeding system No.  1 , the coal feeding system No.  2 , the electronic scales  1 A,  2 A,  1 B, and  2 B, respectively, for controlling coal blending of the coal types A and B on the first belt conveyor A, the first belt conveyor B, or the second belt conveyor.   
     
     
         2 . The coal blending and burning system based on a belt conveyor with a vertical process module according to  claim 1 , wherein a process for controlling coal blending of the coal types A and B on the first belt conveyor A via the controller comprises the following steps:
 S101: starting a conveyor of the first belt conveyor A; configuring a coal-blending flow rate of the coal type A and a coal-blending flow rate of the coal type B;   S102: starting the coal feeding systems No.  1  and No.  2 , opening the discharge ports  1 A and  2 A, and releasing a coal material onto the first belt conveyor A simultaneously;   S103: determining whether a flow rate detected by the electronic scale  2 A matches the coal-blending flow rate of the coal type B; if not, adjusting a discharge amount at the discharge port  2 A and repeating step S103; otherwise, executing step S104;   S104: determining whether a difference between a flow rate detected by the electronic scale  1 A and the flow rate detected by the electronic scale  2 A matches the coal-blending flow rate of the coal type A; if not, adjusting a discharge amount at the discharge port  1 A and repeating step S104; otherwise, executing step S105; and   S105: repeating steps S103-S104 until a coal-blending stop command is received.   
     
     
         3 . The coal blending and burning system based on a belt conveyor with a vertical process module according to  claim 1 , wherein a process for controlling blending of the coal types A and B on the first belt conveyor B via the controller comprises the following steps:
 S111: starting a conveyor of the first belt conveyor B; configuring a coal-blending flow rate of the coal type A and a coal-blending flow rate of the coal type B;   S112: starting the coal feeding systems No.  1  and No.  2 , opening the discharge ports  1 B and  2 B, and releasing a coal material onto the first belt conveyor B simultaneously;   S113: determining whether a flow rate detected by the electronic scale  2 B matches the coal-blending flow rate of the coal type B; if not, adjusting a discharge amount at the discharge port  2 B and repeating step S103; otherwise, executing step S104;   S114: determining whether a difference between a flow rate detected by the electronic scale  1 B and the flow rate detected by the electronic scale  2 B matches the coal-blending flow rate of the coal type A; if not, adjusting a discharge amount at the discharge port  1 B and repeating step S114; otherwise, executing step S115; and   S115: repeating steps S113-S114 until a coal-blending stop command is received.   
     
     
         4 . The coal blending and burning system based on a belt conveyor with a vertical process module according to  claim 1 , wherein a process for controlling blending of the coal types A and B on the second belt conveyor via the controller comprises the following steps:
 S201: starting conveyors of the first belt conveyors A and B, respectively; configuring a coal-blending flow rate of the coal type A and a coal-blending flow rate of the coal type B;   S202: starting the coal feeding systems No.  1  and No.  2 , opening the discharge ports  1 A and  2 B, and releasing a coal material onto the first belt conveyors A and B, respectively;   S203: coal materials on the first belt conveyors A and B all dropping onto the second belt conveyor via the vertical drop tube for coal blending;   S204: determining whether a flow rate detected by the electronic scale  1 A matches the coal-blending flow rate of the coal type A; if not, adjusting a discharge amount at the discharge port  1 A and repeating step S204; determining whether a flow rate detected by the electronic scale  2 B matches the coal-blending flow rate of the coal type B; if not, adjusting a discharge amount at the discharge port  2 B, and repeating step S204; and   S205: repeating step S204 until a coal-blending stop command is received.   
     
     
         5 . The coal blending and burning system based on a belt conveyor with a vertical process module according to  claim 1 , wherein the second belt conveyor comprises second belt conveyors A and B that are connected in parallel to an output port of the vertical drop tube; the third belt conveyor comprises third belt conveyors A and B; the third belt conveyor A is connected to the second belt conveyor A, and the third belt conveyor B is connected to the second belt conveyor B; the third belt conveyor A is provided with a third belt conveyor A electronic scale, and the third belt conveyor B is provided with a third belt conveyor B electronic scale; the vertical drop tube is internally provided with a baffle and a driver for driving the baffle to rotate, for distributing a coal material flowing from the input port of the vertical drop tube onto the second belt conveyors A and B. 
     
     
         6 . The coal blending and burning system based on a belt conveyor with a vertical process module according to  claim 5 , wherein a process for controlling blending of the coal types A and B on the second belt conveyor via the controller comprises the following steps:
 S301: starting conveyors of the first belt conveyors A and B, respectively; configuring a coal-blending flow rate of the coal type A and a coal-blending flow rate of the coal type B;   S302: starting the coal feeding systems No.  1  and No.  2 , opening the discharge ports  1 A and  2 B, and releasing a coal material onto the first belt conveyors A and B, respectively;   S303: determining whether a flow rate detected by the electronic scale  1 A matches the coal-blending flow rate of the coal type A; if not, adjusting a discharge amount at the discharge port  1 A and repeating step S303; determining whether a flow rate detected by the electronic scale  2 B matches the coal-blending flow rate of the coal type B; if not, adjusting a discharge amount at the discharge port  2 B, and repeating step S303; and   S304: driving the baffle inside the vertical drop tube to rotate via the driver onto a middle position for distributing coal to the second belt conveyors A and B;   S305: determining whether a flow rate detected by the third belt conveyor A electronic scale matches an average value of a sum of the coal-blending flow rates of the coal types A and B; if not, adjusting an angle of the baffle inside the vertical drop tube; determining whether a flow rate detected by the third belt conveyor B electronic scale matches an average value of a sum of the coal-blending flow rates of the coal types A and B; if not, adjusting the angle of the baffle inside the vertical drop tube; and   S306: repeating steps S303-S305 until a coal-blending stop command is received.   
     
     
         7 . The coal blending and burning system based on a belt conveyor with a vertical process module according to  claim 5 , wherein the process for controlling blending of the coal types A and B on the second belt conveyor via the controller comprises the following steps:
 S401: starting conveyors of the first belt conveyors A and B, respectively;   S402: starting the coal feeding systems No.  1  and No.  2 , opening the discharge ports  1 A and  2 B, and releasing a coal material onto the first belt conveyors A and B, respectively; and   S403: driving the baffle inside the vertical drop tube to rotate via the driver such that the coal type B drops onto the second belt conveyor A completely, the coal type A is partially mixed with the coal type B via the baffle according to actual coal blending requirements and drops onto the second belt conveyor A, and a remainder drops onto the second belt conveyor B.   
     
     
         8 . The coal blending and burning system based on a belt conveyor with a vertical process module according to  claim 5 , wherein the vertical drop tube is further provided with a tilt sensor for measuring a rotation angle of the baffle. 
     
     
         9 . The coal blending and burning system based on a belt conveyor with a vertical process module according to  claim 5 , wherein belt conveyors A and B are further disposed at a bottom portion of the vertical drop tube, and configured to transport a coal material to the second belt conveyors A and B, respectively. 
     
     
         10 . The coal blending and burning system based on a belt conveyor with a vertical process module according to  claim 1 , wherein the controller further continuously executes an anti-coal-interruption interlocking protection step during the control process of coal blending: after detecting discharge from the coal feeding system  2 , the coal feeding system  1  discharges; when coal interruption is detected in either the coal feeding system  1  or the coal feeding system  2 , the other coal feeding system stops discharging; and
 whether the coal feeding system No.  1  or No.  2  discharges is determined by determining a flow rate output by the electronic scale disposed at the discharge port of the coal feeding system No.  1  or No.  2 .